This he expounds confidently and enthusiastically in his "Life of Moses." Philo in this book is not any longer the apt pupil of Greek philosophers, nor the eloquent defender of the Jewish-Alexandrian community against lying detractors. He preaches a mission to the whole world, and he lays before it his gospel of monotheism and humanity. Each Greek school has its ideal type, its Socrates, Diogenes, or Pythagoras; but Philo places above them all "the most perfect man that ever lived, Moses, the legislator of the Jews,[87] as some hold, but according to others the interpreter of the sacred laws, and the greatest of men in every way." And above all the ethical systems of the day he sets the law of life that God revealed to His greatest prophet: "The laws of the Greek legislators are continually subject to change; the laws of Moses alone remain steady, unmoved, unshaken, stamped as it were with the seal of nature herself, from the day when they were written to the present day, and will so remain for all time so long as the world endures. Not only the Jews but all other peoples who care for righteousness adopt them.... Let all men follow this code and the age of universal peace will come about, the kingdom of God on earth will be established."[88] Nor is the Greek to fear the lot of a proselyte. "God loves the man who turns from idolatry to the true faith not less than the man who has been a believer all his life;"[89] and in the little essays upon Repentance and Nobility, which are attached to the larger treatise, Philo appeals to his own people to welcome the stranger within the community. "The Life of Moses" is the greatest attempt to set monotheism before the world made before the Christian gospels. And it is truer to the Jewish spirit, because it breathes on every page love for the Torah. Philo in very truth wished to fulfil the law.